Snorlax is better Competitivley. Insanely Bulky and Great attack he can Take hits and Dish them out. For sets.
Snorlax@Leftover
Thick Fat
Impish
252 def 252 hp 4atk
-Stockpile
-Belly Drum
-Rest
-Crunch
Snorlax@Assault Vest
Thick Fat
Adamant
252atk 216Def 40spdef
-Rockslide
-Return
-Puruit
-Fire Punch
Ursaring has great Attack but slightly less then average bulk and horrid speed. Quick Feet can help that some tho.
Ursaring@Toxic Orb(if quick feet)/Burn Orb(if guts)
Jolly/Adamant
Guts/Quick Feet
252 atk 252 speed 4spdef
-Swords Dance/Protect
-Facade
-Close Cobat
-Crunch
Beartic is arguably the worst of the 3 but has his moments
Beartic@Life orb
Jolly/Adamant
Swift Swim
252 atk 252 speed 4hp
-Hone Claws
-Icicle Crash
-Stone Edge
-Brick Break/Night Slash/Bulldoze